Coseismic changes in groundwater level during the 2018 Hokkaido Eastern Iburi earthquake

Abstract

Six wells were continuously monitored in Hokkaido, northern Japan, to relate groundwater level changes to regional seismic activity. Groundwater level changes following the 2018 Hokkaido Eastern Iburi earthquake were detected in three of the six wells, even though they are located hundreds of kilometers from the epicenter. The groundwater level changes are qualitatively consistent with the volumetric strain induced by the earthquake. We analyzed groundwater level responses to the M 2 tidal constituent before and after the earthquake, but related changes in amplitude and phase shifts remained within the usual variation. Observed coseismic change was explained by the response to the M 2 tidal constituent component and the calculated volumetric strain for one of the wells, where groundwater level decreased. The observed change in the other two was found to be much greater than the corresponding estimates of the volumetric strain.

Analysis of Changes in Land Use/Land Cover and Hydrological Processes Caused by Earthquakes in the Atsuma River Basin in Japan

“…Zhou et al [13] analyzed the mechanism of regional landslides and the stability and permanent displacement of slopes based on the effects of continuous heavy rainfall and seismic motion. Shibata et al [14] reported changes in groundwater levels based on the responses of the groundwater level to the M2 tidal constituent before and after the earthquake. Kubo et al [15] investigated the source rupture process of an earthquake in Japan and reproduced the overall ground motion characteristics of the sedimentary layers of the Ishikari Lowland.…”

Deformation Regimes of Fluid-Saturated Reservoirs Under Seismic Impact According to Precision Hydrogeological Monitoring Data (A Review)

“…2. Постсейсмическое снижение уровня в скважине Jiangyou при землетрясении Венчуань 12.05.2008 г., М7.9, на врезке -данные прецизионного мониторинга [Liao et al, 2015] В промежуточной зоне, которая определяется эпицентральным расстоянием, составляющим от 1 до 10 длины разлома, и дальней, на эпицентральных расстояниях более 10 длины разлома, гидрогеологические отклики в флюидонасыщенных коллекторах изменяются в широких пределах от первых сантиметров до десятков [Lee et al, 2012;Shi et al, 2014;Shibata et al, 2020;Liu et al, 2023]. В частности, при землетрясении в Пакистане 24.09.2013 г., М7.7 в скважинах, расположенных на эпицентральных расстояниях ~ 3000 км в Израиле, прослежены различные гидрогеологические эффекты.…”

Characterisation of the Hydrogeological Properties of the Ntane Sandstone Aquifer Using Co-Seismic and Post-Seismic Groundwater Level Responses to the Mw 6.5 Moiyabana Earthquake, Central Botswana

“…Seismic waves often change the permeability and storage properties of an aquifer system. Therefore, these properties can be estimated from the amplitude responses and phase shifts of tidal components of the groundwater level [8,15,64]. Thus, temporal variations in the tidal constants might reflect changes in aquifer hydraulic properties.…”